came home tonight and switched on my lights in my room and heard this buzzing sound coming from multiple sources in the room. realized that my ups had switched to using the backup battery, and that was causing my monitor and the power supply on one of my computers to buzz like crazy. only about 460 out of 845 watts were being used, so i wasn't overloading it. unit didn't seem to want to switch back over to wall power until i unplugged both offending devices, unplugged, and replugged the ups (although it didn't immediately switch over to wall power, so the timing could have been coincidental). when i looked at the monitoring program, it said the outlet had a blackout for as long as it was on battery (about 9 minutes), but i tested a lamp plugged into the same outlet and it worked fine (ups on bottom plug, lamp on top one).
what's up with that? is the buzzing bad? was worried that my components were going to explode!
also, i know apc recommends against having a power strip attached to their unit, but is there anything to that? i've got two power strips: one with basically no draw (connected devices are a cable modem and wireless router), and one with alot of draw (home theater receiver, television, htpc). i will eventually be getting another ups for the other side of the room, so the receiver, tv, and htpc will have their own ups. for now, even with everything turned on, i only use 645 out of the 845 watt capability. will the extension cord/power strip hookup cause a problem?
what's up with that? is the buzzing bad? was worried that my components were going to explode!
also, i know apc recommends against having a power strip attached to their unit, but is there anything to that? i've got two power strips: one with basically no draw (connected devices are a cable modem and wireless router), and one with alot of draw (home theater receiver, television, htpc). i will eventually be getting another ups for the other side of the room, so the receiver, tv, and htpc will have their own ups. for now, even with everything turned on, i only use 645 out of the 845 watt capability. will the extension cord/power strip hookup cause a problem?